(i) For a weak electrolyte molar conductance in dilute solution increases sharply as its concentration in solution is decreased. Give reason.
(ii) Write overall cell reaction for lead storage battery when the battery is being charged.

Explanation

(i) Weak electrolytes have lower degree of dissociation at higher concentration. For such electrolytes the sharp increase in molar conductance with dilution is due to increase in the degree of dissociation. The number of ions in total volume of the solution that contains 1 mole of the electrolyte increases. This is why for weak electrolytes, the molar conductance increases with dilution.
(ii) Lead storage battery when it is being charged:
`2PbSO_(4) (s) + 2H_(2)O (l) to Pb(s) + PbO_(2)(s) + 2H_(2)SO_(4)(aq)`